From de134877a643b4a82b7f852014a9cc18a5b6e0af Mon Sep 17 00:00:00 2001 From: Tau Date: Sat, 2 Nov 2019 13:28:55 -0400 Subject: [PATCH] platform/netenv.c: Virualize LAN configuration --- platform/config.c | 46 +++- platform/config.h | 10 + platform/meson.build | 2 + platform/netenv.c | 501 +++++++++++++++++++++++++++++++++++++++++++ platform/netenv.h | 13 ++ platform/platform.c | 13 ++ 6 files changed, 584 insertions(+), 1 deletion(-) create mode 100644 platform/netenv.c create mode 100644 platform/netenv.h diff --git a/platform/config.c b/platform/config.c index 1c49620..f682079 100644 --- a/platform/config.c +++ b/platform/config.c @@ -22,6 +22,7 @@ void alls_config_load(struct alls_config *cfg, const wchar_t *filename) hwmon_config_load(&cfg->hwmon, filename); misc_config_load(&cfg->misc, filename); pcbid_config_load(&cfg->pcbid, filename); + netenv_config_load(&cfg->netenv, filename); nusec_config_load(&cfg->nusec, filename); vfs_config_load(&cfg->vfs, filename); } @@ -36,6 +37,7 @@ void nu_config_load(struct nu_config *cfg, const wchar_t *filename) dns_config_load(&cfg->dns, filename); hwmon_config_load(&cfg->hwmon, filename); misc_config_load(&cfg->misc, filename); + netenv_config_load(&cfg->netenv, filename); nusec_config_load(&cfg->nusec, filename); vfs_config_load(&cfg->vfs, filename); } @@ -127,6 +129,48 @@ void misc_config_load(struct misc_config *cfg, const wchar_t *filename) cfg->enable = GetPrivateProfileIntW(L"misc", L"enable", 1, filename); } +void netenv_config_load(struct netenv_config *cfg, const wchar_t *filename) +{ + wchar_t mac_addr[18]; + + assert(cfg != NULL); + assert(filename != NULL); + + memset(cfg, 0, sizeof(*cfg)); + + cfg->enable = GetPrivateProfileIntW(L"netenv", L"enable", 0, filename); + + cfg->addr_suffix = GetPrivateProfileIntW( + L"netenv", + L"addrSuffix", + 11, + filename); + + cfg->router_suffix = GetPrivateProfileIntW( + L"netenv", + L"routerSuffix", + 254, + filename); + + GetPrivateProfileStringW( + L"netenv", + L"macAddr", + L"01:02:03:04:05:06", + mac_addr, + _countof(mac_addr), + filename); + + swscanf(mac_addr, + L"%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", + &cfg->mac_addr[0], + &cfg->mac_addr[1], + &cfg->mac_addr[2], + &cfg->mac_addr[3], + &cfg->mac_addr[4], + &cfg->mac_addr[5], + &cfg->mac_addr[6]); +} + void nusec_config_load(struct nusec_config *cfg, const wchar_t *filename) { wchar_t keychip_id[17]; @@ -199,7 +243,7 @@ void nusec_config_load(struct nusec_config *cfg, const wchar_t *filename) } swscanf(subnet, L"%hhu.%hhu.%hhu.%hhu", &ip[0], &ip[1], &ip[2], &ip[3]); - cfg->subnet = (ip[0] << 24) | (ip[1] << 16) | (ip[2] << 8) | ip[3]; + cfg->subnet = (ip[0] << 24) | (ip[1] << 16) | (ip[2] << 8) | 0; GetPrivateProfileStringW( L"keychip", diff --git a/platform/config.h b/platform/config.h index 58fb3e7..4acc181 100644 --- a/platform/config.h +++ b/platform/config.h @@ -32,6 +32,13 @@ struct misc_config { bool enable; }; +struct netenv_config { + bool enable; + uint8_t addr_suffix; + uint8_t router_suffix; + uint8_t mac_addr[6]; +}; + struct nusec_config { bool enable; char keychip_id[16]; @@ -61,6 +68,7 @@ struct nu_config { struct dns_config dns; struct hwmon_config hwmon; struct misc_config misc; + struct netenv_config netenv; struct nusec_config nusec; struct vfs_config vfs; }; @@ -72,6 +80,7 @@ struct alls_config { struct hwmon_config hwmon; struct misc_config misc; struct pcbid_config pcbid; + struct netenv_config netenv; struct nusec_config nusec; struct vfs_config vfs; }; @@ -84,6 +93,7 @@ void clock_config_load(struct clock_config *cfg, const wchar_t *filename); void dns_config_load(struct dns_config *cfg, const wchar_t *filename); void hwmon_config_load(struct hwmon_config *cfg, const wchar_t *filename); void misc_config_load(struct misc_config *cfg, const wchar_t *filename); +void netenv_config_load(struct netenv_config *cfg, const wchar_t *filename); void nusec_config_load(struct nusec_config *cfg, const wchar_t *filename); void pcbid_config_load(struct pcbid_config *cfg, const wchar_t *filename); void vfs_config_load(struct vfs_config *cfg, const wchar_t *filename); diff --git a/platform/meson.build b/platform/meson.build index b63a108..d45f498 100644 --- a/platform/meson.build +++ b/platform/meson.build @@ -19,6 +19,8 @@ platform_lib = static_library( 'hwmon.h', 'misc.c', 'misc.h', + 'netenv.c', + 'netenv.h', 'nusec.c', 'nusec.h', 'pcbid.c', diff --git a/platform/netenv.c b/platform/netenv.c new file mode 100644 index 0000000..0309922 --- /dev/null +++ b/platform/netenv.c @@ -0,0 +1,501 @@ +#include +#include + +#include +#include +#include +#include +#include + +#include "hook/table.h" + +#include "platform/config.h" +#include "platform/netenv.h" + +#include "util/dprintf.h" + +struct netenv { + IP_ADAPTER_ADDRESSES head; + char name[64]; + wchar_t dns_suffix[64]; + wchar_t description[64]; + wchar_t friendly_name[64]; + IP_ADAPTER_PREFIX prefix; + IP_ADAPTER_UNICAST_ADDRESS iface; + IP_ADAPTER_GATEWAY_ADDRESS router; + IP_ADAPTER_DNS_SERVER_ADDRESS dns; + struct sockaddr_in prefix_sa; + struct sockaddr_in iface_sa; + struct sockaddr_in router_sa; + struct sockaddr_in dns_sa; +}; + +/* Hook functions */ + +static uint32_t WINAPI hook_GetAdaptersAddresses( + uint32_t Family, + uint32_t Flags, + void *Reserved, + IP_ADAPTER_ADDRESSES *AdapterAddresses, + uint32_t *SizePointer); + +static uint32_t WINAPI hook_GetAdaptersInfo( + IP_ADAPTER_INFO *AdapterInfo, + uint32_t *SizePointer); + +static uint32_t WINAPI hook_GetBestRoute( + uint32_t src_ip, + uint32_t dest_ip, + MIB_IPFORWARDROW *route); + +static uint32_t WINAPI hook_GetIfTable( + MIB_IFTABLE *pIfTable, + uint32_t *pdwSize, + BOOL bOrder); + +static uint32_t WINAPI hook_IcmpSendEcho2( + HANDLE IcmpHandle, + HANDLE Event, + PIO_APC_ROUTINE ApcRoutine, + void *ApcContext, + uint32_t DestinationAddress, + void *RequestData, + uint16_t RequestSize, + IP_OPTION_INFORMATION *RequestOptions, + void *ReplyBuffer, + uint32_t ReplySize, + uint32_t Timeout); + +/* Link pointers */ + +static uint32_t WINAPI (*next_GetAdaptersAddresses)( + uint32_t Family, + uint32_t Flags, + void *Reserved, + IP_ADAPTER_ADDRESSES *AdapterAddresses, + uint32_t *SizePointer); + +static uint32_t WINAPI (*next_GetAdaptersInfo)( + IP_ADAPTER_INFO *AdapterInfo, + uint32_t *SizePointer); + +static uint32_t WINAPI (*next_GetBestRoute)( + uint32_t src_ip, + uint32_t dest_ip, + MIB_IPFORWARDROW *route); + +static uint32_t WINAPI (*next_GetIfTable)( + MIB_IFTABLE *pIfTable, + uint32_t *pdwSize, + BOOL bOrder); + +static uint32_t WINAPI (*next_IcmpSendEcho2)( + HANDLE IcmpHandle, + HANDLE Event, + PIO_APC_ROUTINE ApcRoutine, + void *ApcContext, + uint32_t DestinationAddress, + void *RequestData, + uint16_t RequestSize, + IP_OPTION_INFORMATION *RequestOptions, + void *ReplyBuffer, + uint32_t ReplySize, + uint32_t Timeout); + +static const struct hook_symbol netenv_hook_syms[] = { + { + .name = "GetAdaptersAddresses", + .patch = hook_GetAdaptersAddresses, + .link = (void **) &next_GetAdaptersAddresses, + }, { + .name = "GetAdaptersInfo", + .patch = hook_GetAdaptersInfo, + .link = (void **) &next_GetAdaptersInfo, + }, { + .name = "GetBestRoute", + .patch = hook_GetBestRoute, + .link = (void **) &next_GetBestRoute, + }, { + .name = "GetIfTable", + .patch = hook_GetIfTable, + .link = (void **) &next_GetIfTable, + }, { + .name = "IcmpSendEcho2", + .patch = hook_IcmpSendEcho2, + .link = (void **) &next_IcmpSendEcho2, + } +}; + +static uint32_t netenv_ip_prefix; +static uint32_t netenv_ip_iface; +static uint32_t netenv_ip_router; +static uint8_t netenv_mac_addr[6]; + +HRESULT netenv_hook_init( + const struct netenv_config *cfg, + const struct nusec_config *kc_cfg) +{ + assert(cfg != NULL); + assert(kc_cfg != NULL); + + if (!cfg->enable) { + return S_FALSE; + } + + if (!kc_cfg->enable) { + dprintf("Netenv: Keychip emu is off? Disabling Netenv emu.\n"); + + return S_FALSE; + } + + netenv_ip_prefix = kc_cfg->subnet; + netenv_ip_iface = kc_cfg->subnet | cfg->addr_suffix; + netenv_ip_router = kc_cfg->subnet | cfg->router_suffix; + memcpy(netenv_mac_addr, cfg->mac_addr, sizeof(netenv_mac_addr)); + + hook_table_apply( + NULL, + "iphlpapi.dll", + netenv_hook_syms, + _countof(netenv_hook_syms)); + + return S_OK; +} + +static uint32_t WINAPI hook_GetAdaptersAddresses( + uint32_t Family, + uint32_t Flags, + void *Reserved, + IP_ADAPTER_ADDRESSES *AdapterAddresses, + uint32_t *SizePointer) +{ + /* This hook errs on the side of caution and returns a lot more + information than the ALLNET lib cares about. MSVC mangles the main + call site for this API quite aggressively, so by the time we decompile + the code in question it's a little difficult to tell which pieces the + ALLNET lib pays attention to. */ + + uint32_t nbytes; + struct netenv *env; + + if (Reserved != NULL || SizePointer == NULL) { + return ERROR_INVALID_PARAMETER; + } + + nbytes = *SizePointer; + *SizePointer = sizeof(*env); + + if (AdapterAddresses == NULL || nbytes < sizeof(*env)) { + return ERROR_BUFFER_OVERFLOW; + } + + env = CONTAINING_RECORD(AdapterAddresses, struct netenv, head); + memset(env, 0, sizeof(*env)); + + env->head.Length = sizeof(env->head); + env->head.IfIndex = 1; + env->head.AdapterName = env->name; + env->head.FirstUnicastAddress = &env->iface; + env->head.FirstDnsServerAddress = &env->dns; + env->head.DnsSuffix = env->dns_suffix; + env->head.Description = env->description; + env->head.FriendlyName = env->friendly_name; + memcpy( env->head.PhysicalAddress, + netenv_mac_addr, + sizeof(netenv_mac_addr)); + env->head.PhysicalAddressLength = sizeof(netenv_mac_addr); + env->head.Flags = IP_ADAPTER_DHCP_ENABLED | IP_ADAPTER_IPV4_ENABLED; + env->head.Mtu = 4200; /* idk what's typical here */ + env->head.IfType = IF_TYPE_ETHERNET_CSMACD; + env->head.OperStatus = IfOperStatusUp; + env->head.FirstPrefix = &env->prefix; + env->head.FirstGatewayAddress = &env->router; + + strcpy_s( + env->name, + _countof(env->name), + "{00000000-0000-0000-0000-000000000000}"); + + wcscpy_s( + env->dns_suffix, + _countof(env->dns_suffix), + L"local"); + + wcscpy_s( + env->description, + _countof(env->description), + L"Interface Description"); + + wcscpy_s( + env->friendly_name, + _countof(env->friendly_name), + L"Fake Ethernet"); + + env->iface.Length = sizeof(env->iface); + env->iface.Flags = 0; + env->iface.Address.lpSockaddr = (struct sockaddr *) &env->iface_sa; + env->iface.Address.iSockaddrLength = sizeof(env->iface_sa); + env->iface.PrefixOrigin = IpPrefixOriginDhcp; + env->iface.SuffixOrigin = IpSuffixOriginDhcp; + env->iface.DadState = IpDadStatePreferred; + env->iface.ValidLifetime = UINT32_MAX; + env->iface.PreferredLifetime = UINT32_MAX; + env->iface.LeaseLifetime = 86400; + env->iface.OnLinkPrefixLength = 24; + + env->prefix.Length = sizeof(env->prefix); + env->prefix.Address.lpSockaddr = (struct sockaddr *) &env->prefix_sa; + env->prefix.Address.iSockaddrLength = sizeof(env->prefix_sa); + env->prefix.PrefixLength = 24; + + env->router.Length = sizeof(env->router); + env->router.Address.lpSockaddr = (struct sockaddr *) &env->router_sa; + env->router.Address.iSockaddrLength = sizeof(env->router_sa); + + env->dns.Length = sizeof(env->dns); + env->dns.Address.lpSockaddr = (struct sockaddr *) &env->dns_sa; + env->dns.Address.iSockaddrLength = sizeof(env->dns_sa); + + env->prefix_sa.sin_family = AF_INET; + env->prefix_sa.sin_addr.s_addr = _byteswap_ulong(netenv_ip_prefix); + + env->iface_sa.sin_family = AF_INET; + env->iface_sa.sin_addr.s_addr = _byteswap_ulong(netenv_ip_iface); + + env->router_sa.sin_family = AF_INET; + env->router_sa.sin_addr.s_addr = _byteswap_ulong(netenv_ip_router); + + env->dns_sa.sin_family = AF_INET; + env->dns_sa.sin_addr.s_addr = _byteswap_ulong(netenv_ip_router); + + return ERROR_SUCCESS; +} + +static uint32_t WINAPI hook_GetAdaptersInfo( + IP_ADAPTER_INFO *ai, + uint32_t *nbytes_inout) +{ + IP_ADDR_STRING iface; + IP_ADDR_STRING router; + uint32_t nbytes; + + if (nbytes_inout == NULL) { + return ERROR_INVALID_PARAMETER; + } + + nbytes = *nbytes_inout; + *nbytes_inout = sizeof(*ai); + + if (ai == NULL || nbytes < sizeof(*ai)) { + return ERROR_BUFFER_OVERFLOW; + } + + dprintf("Netenv: GetAdaptersInfo: Virtualized LAN configuration:\n"); + dprintf("Netenv: Interface IP : %3i.%3i.%3i.%3i\n", + (uint8_t) (netenv_ip_iface >> 24), + (uint8_t) (netenv_ip_iface >> 16), + (uint8_t) (netenv_ip_iface >> 8), + (uint8_t) (netenv_ip_iface )); + dprintf("Netenv: Router IP : %3i.%3i.%3i.%3i\n", + (uint8_t) (netenv_ip_router >> 24), + (uint8_t) (netenv_ip_router >> 16), + (uint8_t) (netenv_ip_router >> 8), + (uint8_t) (netenv_ip_router )); + dprintf("Netenv: MAC Address : %02x:%02x:%02x:%02x:%02x:%02x\n", + netenv_mac_addr[0], + netenv_mac_addr[1], + netenv_mac_addr[2], + netenv_mac_addr[3], + netenv_mac_addr[4], + netenv_mac_addr[5]); + + memset(&iface, 0, sizeof(iface)); + memset(&router, 0, sizeof(router)); + + sprintf_s( + iface.IpAddress.String, + _countof(iface.IpAddress.String), + "%i.%i.%i.%i", + (uint8_t) (netenv_ip_iface >> 24), + (uint8_t) (netenv_ip_iface >> 16), + (uint8_t) (netenv_ip_iface >> 8), + (uint8_t) (netenv_ip_iface )); + + strcpy_s( + iface.IpMask.String, + _countof(iface.IpMask.String), + "255.255.255.0"); + + sprintf_s( + router.IpAddress.String, + _countof(iface.IpAddress.String), + "%i.%i.%i.%i", + (uint8_t) (netenv_ip_router >> 24), + (uint8_t) (netenv_ip_router >> 16), + (uint8_t) (netenv_ip_router >> 8), + (uint8_t) (netenv_ip_router )); + + strcpy_s( + router.IpMask.String, + _countof(router.IpMask.String), + "255.255.255.0"); + + memset(ai, 0, sizeof(*ai)); + strcpy_s( + ai->AdapterName, + _countof(ai->AdapterName), + "Fake Ethernet"); + strcpy_s(ai->Description, + _countof(ai->Description), + "Adapter Description"); + ai->AddressLength = sizeof(netenv_mac_addr); + memcpy(ai->Address, netenv_mac_addr, sizeof(netenv_mac_addr)); + ai->Index = 1; + ai->Type = MIB_IF_TYPE_ETHERNET; + ai->DhcpEnabled = 1; + memcpy(&ai->IpAddressList, &iface, sizeof(iface)); + memcpy(&ai->GatewayList, &router, sizeof(router)); + memcpy(&ai->DhcpServer, &router, sizeof(router)); + ai->LeaseObtained = time(NULL) - 3600; + ai->LeaseExpires = time(NULL) + 86400; + + return ERROR_SUCCESS; +} + +static uint32_t WINAPI hook_GetBestRoute( + uint32_t src_ip, + uint32_t dest_ip, + MIB_IPFORWARDROW *route) +{ + if (route == NULL) { + return ERROR_INVALID_PARAMETER; + } + + dprintf("Netenv: GetBestRoute ip4 %x -> ip4 %x\n", + (int) _byteswap_ulong(src_ip), + (int) _byteswap_ulong(dest_ip)); + + memset(route, 0, sizeof(*route)); + + /* This doesn't seem to get read? It just needs to succeed. */ + + route->dwForwardDest = 0x00000000; + route->dwForwardMask = 0xFFFFFFFF; + route->dwForwardPolicy = 0; /* idk */ + route->dwForwardNextHop = _byteswap_ulong(netenv_ip_router); + route->dwForwardIfIndex = 1; + route->dwForwardType = MIB_IPROUTE_TYPE_INDIRECT; + route->dwForwardProto = MIB_IPPROTO_NETMGMT; + + return ERROR_SUCCESS; +} + +static uint32_t WINAPI hook_GetIfTable( + MIB_IFTABLE *pIfTable, + uint32_t *pdwSize, + BOOL bOrder) +{ + /* This only gets called if the link is down, or something like that. + Well, I took the time to write this hook, so let's at least preserve it + in the Git history. */ + + MIB_IFROW *row; + uint32_t nbytes; + + if (pdwSize == NULL) { + return ERROR_INVALID_PARAMETER; + } + + nbytes = *pdwSize; + *pdwSize = sizeof(*row) + sizeof(DWORD); + + if (pIfTable == NULL || nbytes < sizeof(*row) + sizeof(DWORD)) { + return ERROR_BUFFER_OVERFLOW; + } + + dprintf("Netenv: Virtualized GetIfTable (shouldn't get called?)\n"); + + row = pIfTable->table; + memset(row, 0, sizeof(*row)); + + wcscpy_s(row->wszName, _countof(row->wszName), L"Fake Ethernet"); + row->dwIndex = 1; /* Should match other IF_INDEX fields we return */ + row->dwType = IF_TYPE_ETHERNET_CSMACD; + row->dwMtu = 4200; /* I guess? */ + row->dwSpeed = 1000000000; + row->dwPhysAddrLen = sizeof(netenv_mac_addr); + memcpy(row->bPhysAddr, netenv_mac_addr, sizeof(netenv_mac_addr)); + row->dwAdminStatus = 1; + row->dwOperStatus = IF_OPER_STATUS_CONNECTED; + + return ERROR_SUCCESS; +} + +static uint32_t WINAPI hook_IcmpSendEcho2( + HANDLE IcmpHandle, + HANDLE Event, + PIO_APC_ROUTINE ApcRoutine, + void *ApcContext, + uint32_t DestinationAddress, + void *RequestData, + uint16_t RequestSize, + IP_OPTION_INFORMATION *RequestOptions, + void *ReplyBuffer, + uint32_t ReplySize, + uint32_t Timeout) +{ + ICMP_ECHO_REPLY *pong; + BOOL ok; + + if (IcmpHandle == NULL || IcmpHandle == INVALID_HANDLE_VALUE) { + SetLastError(ERROR_INVALID_PARAMETER); + + return 0; + } + + if (ApcRoutine != NULL) { + dprintf("%s: Got APC routine...\n", __func__); + SetLastError(ERROR_NOT_SUPPORTED); + + return 0; + } + + if (ReplyBuffer == NULL) { + SetLastError(ERROR_INVALID_PARAMETER); + + return 0; + } + + if (ReplySize < sizeof(ICMP_ECHO_REPLY)) { + SetLastError(IP_BUF_TOO_SMALL); + + return 0; + } + + dprintf("Netenv: Virtualized ICMP Ping to ip4 %x\n", + (int) _byteswap_ulong(DestinationAddress)); + + pong = (ICMP_ECHO_REPLY *) ReplyBuffer; + memset(pong, 0, sizeof(*pong)); + pong->Address = DestinationAddress; + pong->Status = IP_SUCCESS; + pong->RoundTripTime = 1; + pong->DataSize = 0; + pong->Reserved = 1; /* Number of ICMP_ECHO_REPLY structs in ReplyBuffer */ + pong->Data = NULL; + + if (Event != NULL) { + ok = SetEvent(Event); + + if (ok) { + SetLastError(ERROR_IO_PENDING); + } + + return 0; + } + + dprintf("%s: Unexpected synchronous call...\n", __func__); + SetLastError(ERROR_SUCCESS); + + return 1; +} diff --git a/platform/netenv.h b/platform/netenv.h new file mode 100644 index 0000000..b84d748 --- /dev/null +++ b/platform/netenv.h @@ -0,0 +1,13 @@ +#pragma once + +#include + +#include +#include + +#include "platform/config.h" + +HRESULT netenv_hook_init( + const struct netenv_config *cfg, + const struct nusec_config *kc_cfg); + diff --git a/platform/platform.c b/platform/platform.c index 8af9f57..b778904 100644 --- a/platform/platform.c +++ b/platform/platform.c @@ -8,6 +8,7 @@ #include "platform/dns.h" #include "platform/hwmon.h" #include "platform/misc.h" +#include "platform/netenv.h" #include "platform/nusec.h" #include "platform/pcbid.h" #include "platform/platform.h" @@ -56,6 +57,12 @@ HRESULT platform_hook_init_alls( return hr; } + hr = netenv_hook_init(&cfg->netenv, &cfg->nusec); + + if (FAILED(hr)) { + return hr; + } + hr = nusec_hook_init(&cfg->nusec, game_id, platform_id); if (FAILED(hr)) { @@ -116,6 +123,12 @@ HRESULT platform_hook_init_nu( return hr; } + hr = netenv_hook_init(&cfg->netenv, &cfg->nusec); + + if (FAILED(hr)) { + return hr; + } + hr = nusec_hook_init(&cfg->nusec, game_id, platform_id); if (FAILED(hr)) {